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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'ccca89902e8ec7e468d4ef7a1ba01b836d666f14c1d05125aa94b3fc3325bd58' 
  AND token = 'ZNSqGTG+hE7XAFppcAoFVWWgLJDkm5tENrEknnz9r0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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