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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1450b39960bbffe74263699b4809fe8e37c780d8c9b84298d7cc4bc1e25ad2a' 
  AND token = 'tWRBr+U5q4blzM83zu5rG8cgNpDvK0Pr2zJdtbIxoIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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