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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62044e2cf57064cc1ae33fea9ba0805ab0983bbe3c51772c2f9696a85d8f851d' 
  AND token = '2ijtVa95A8Xi32x/qOYXTjymmalsKaIQN+iTLmMKLJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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