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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ebb041725c8b0bbe54a3ee5f3f2cef481f60f71799e6ad63cd5a0d3312048dee' 
  AND token = 'Lk1DB8gustSlSLDtFGWH5Z3Zm2I3yuxshfRHw7GvBb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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