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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bc40e11cfea170ca09a2a60aed91792cb6ee662ceb17597d46c0dc6838bbb96c' 
  AND token = '46orUInt99FcAID9pmMTY8LsNnqUu4gGMLgTSoynAyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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