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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9795aae8267926512a2a1b88ec3c85cf6628772afaa6381347dc92941d14745e' 
  AND token = 'Zp/qOPJivNl6oLWamNGrtq3Pg6E4HwEDOGYq/propSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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