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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7b096b18a2dfddcc08c669fa340e368fafefa3352d98a0d26bcccd2509fa9b26' 
  AND token = 'AljyaAvir/+t5BK4M0hiA3TexxxLV/S59Q7wNhafVvc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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