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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '941fec76dbb1822e91b519adc804d3a80107899c786acdb55c9c3e69f3105501' 
  AND token = 'XkKe2p2cVsGdhSAh9mHvBLlTy7cN6ezu9JzUUNiLI6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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