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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b62c6daeb550691c5bf43d59082e05a0d463a549fcd1795ba128196c2736990e' 
  AND token = 'Ro6+ycKrHBc6ox1MW63kJNZi/gas75HPC+DfJhNrucA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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