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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f086abe6ab414c66d81f2b3669fe2a6ac66fd15473ea1c180e40ba4832dcb20e' 
  AND token = '23LQ1/WzgrrGXE957IpiA1s+RFila8483y72beggWZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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