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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '089471a0e61168c605022209f174f8b8f0434cfa0c71cf369b0decf84ce6afa9' 
  AND token = 'GNYfX0rBam4Vyyk+Nrgk/v9PZtQ5xIpgt7A8AqZ7yRo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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