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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07c417429204a2edbbd3c91279769333c4b5f0c4c65c6070cf80f4f14525f5a0' 
  AND token = 's03yq6DX2gL46ykfz2QRnolGjcM3C+Ck8t/GBJ4sDi8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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