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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2c7368463647a2ac1926f520fdb60a9db6fc19b2f9b7b182c13824bfc50f7b8e' 
  AND token = 'XCqYcc3EtxBH/4tCVrlDMmwPEYfPHifA26p6c+6dC6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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