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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dac96aa74cc61efe0a16e6574185ede7db9120e3abf49fa77bf32e1d5be5c2e6' 
  AND token = 'OS77OkTsdhp/dXrDYrpprbFQVEwCIFtPgOB2eWsjFEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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