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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '84b801e0d5b12c19d008d41da2b3bacd482fd626a0082dcd78bdc7a7262a485b' 
  AND token = 'xzUbEx7gAxZw7Cisodv4//nD2vP3Ip8hrIsa7L3UWMY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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