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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cab5dc5b286555a228b0b36f6dad53012b179d47d51d8bd8308d7bd324ddc7f8' 
  AND token = '2vtjpzgJWdvPFo+QnpPy1Zpu5o4ppTAPYceLx+5oKW8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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