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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '97d2843d58a260acbe17d06d7dca59f675dadc59ed693efb4b3aacddbe8beae0' 
  AND token = 'lOLSHZAqvld6c4TsF2D67UuV1zp5L5/B8Jvs62gGVUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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