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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2370b0ad7b9bd13b48c83d136d3da2f7670799b09e866d10e265752c54f0f5e6' 
  AND token = 'cKXd4LDEUB38R1UTPtuB9s0OP67HYn3Nx4u/bNM17EA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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