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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5951d5d5b1c8ac179164cea7133d0fd28ead0646908883a7a5b40a601f05c16' 
  AND token = 'SNuQK8ZcB8ELBTs/F0BTL2YB/CROrCZv6Ba9xCNE97A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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