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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '63648b715665e72638438d115ae7baa261135dae35197746ea0bbc95830b8d3d' 
  AND token = 'hJNBpz/R9Eo5JJv3E73L8iEFmO+y9LoviGHqdhmmrn8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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