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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75825cebd0ede0ff4341431eb75868ef66d4b1b43fab24a83001da43d19a8bd0' 
  AND token = '+qu5RermjZnMX/ecRNxZqaXzfBxDNBJA6V1TBykclhc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00113

JSON explain

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