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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '39f364e3f811ea76f1aca4924e525100df29ffe402126c3b54102df9e6fb5d3b' 
  AND token = 'tBYU2qNWKZxhcsZjHE3i9Lco2g0rAALQ8lld7yVLkAk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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