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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2d62d5aad278e3318bfdf38baa8cba23ed5d080a07c0317e25130ce2d546eb7c' 
  AND token = 'NNYdFdSV5c39kxPFhrMPZ7lbR6OXGPHwyE5bX4KeTho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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