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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93ae5360cc0e4d9eb08ac295b885c60f86700546a8c46c66b060666db6607061' 
  AND token = 'CFO/OP5Pb+qrt+hrSTRkyKAaQhHPbT8iVuKY8QpoVYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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