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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '805de1fde98f70837f524067de2ca0512fd48ac5880be805467d22275703991e' 
  AND token = 'hE8FlMKw6ANsUlnK0L+QoOahA5p3+s8rtLpOgUQxrPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}