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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f65aebc4cdfcb24ed7f28fb8ad740fbc14e5098dd50fe6eeb2339b9b5666ce60' 
  AND token = 'NzrHBOrUzcOFpK3G3QO+Llh8NEC3CtBJDT05mP06vF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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