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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7837c367da115ad49da5a6a169dbdf96c2c75ac8e6da723d5f0e541d6006c8b3' 
  AND token = 'fuM6GU0fP/4kHx1X4WI8p96aSMpaMJQuyukD/ZR7UCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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